A natural vegetation succession occurs spontaneously or with the suitable man measures after the continuous disturbance is removed.

在持续干扰条件撤除后，植被系统将自行或在适度人为措施干预下进入自然演替序列。

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The natural vegetation succession rule is also obtained from many years vegetation investigation, which provided the scientific basis and the theory instruction for the vegetation to restore.

从多年的植被调查也得出了排土场边坡天然植被的演替规律，为人为进行排土场的植被恢复提供了科学依据和理论指导。

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It is a useful practical technology for direct seeding in vegetation restoration, while method of natural succession can not be used.

直播造林在石质山地植被恢复中具有明显效果，自然演替恢复效果较差。

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